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Finding the Fourth Proportional to 397,814.20, 596,721.30 and 391,253.20

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Solution

The fourth proportional to 397,814.20, 596,721.30 and 391,253.20 is: 586,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,814.20 : 596,721.30 = 391,253.20 : x
  2. Step 2: Convert to fraction form
    397,814.20/596,721.30 = 391,253.20/x
  3. Step 3: Cross multiply
    397,814.20x = 596,721.30 × 391,253.20
  4. Step 4: Simplify right side
    397,814.20x = 233,469,118,133.16
  5. Step 5: Solve for x
    x = 233,469,118,133.16/397,814.20
  6. Step 6: Final answer
    x = 586,879.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.